dart2js: add initial support for lookup-maps

pkg/compiler/lib/src/ssa/codegen.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of ssa;
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
   final SourceInformationStrategy sourceInformationFactory;
@@ skipping 1906 matching lines @@
       expression = expression.withSourceInformation(sourceInformation);
     }
     push(expression);
   }
 
   visitConstant(HConstant node) {
     assert(isGenerateAtUseSite(node));
     generateConstant(node.constant, node.sourceInformation);
 
     registry.registerCompileTimeConstant(node.constant);
-    backend.constants.addCompileTimeConstantForEmission(node.constant);
   }
 
   visitNot(HNot node) {
     assert(node.inputs.length == 1);
     generateNot(node.inputs[0], node.sourceInformation);
   }
 
   static String mapRelationalOperator(String op, bool inverse) {
     Map<String, String> inverseOperator = const <String, String>{
       "==" : "!=",
@@ skipping 926 matching lines @@
     }
     registry.registerStaticUse(helper);
     return backend.emitter.staticFunctionAccess(helper);
   }
 
   @override
   void visitRef(HRef node) {
     visit(node.value);
   }
 }